DOMINION TRANSMISSION, INC — Gas transmission and gathering — incident on 2012-01-06

Gas transmission and gathering incident in LUTHERSBURG, CLEARFIELD County, PA. Reported cause: OTHER INCIDENT CAUSE. Reported consequences: 0 fatalities, 0 injuries, 1 NATURAL GAS released, $55,000 reported property damage. Operator-reported incident data submitted to PHMSA, generally within 30 days. Records may be supplemented or corrected and do not represent final agency causal findings.

Report number: 20120012.

Operator ID: 2714.

Reported incident date: 1/6/2012 9:30.

Location detail: LUTHER GATE

Cause detail: MISCELLANEOUS

Cause detail: EMPLOYEE WAS READING CORROSION TEST STATION AT LN 50 GATE SITE 107 ( LUTHERSBURG GATES) -EMPLOYEE REMOVED A TS CAP NEAR GATE#107-J AND NOTICED GAS ESCAPING OUT OF THE TS PIPE. EMPLOYEE IMMEDIATELY REPORTED THE LEAK TO SUPERVISORY PERSONNEL. INVESTIGATION FOUND THAT GAS APPEARED TO BE COMING FROM THE 107-J GATE. THIS IS A 6' TEMPORARY FEED FROM LUTHER STATION TO LN-50. IT WAS ALSO DETERMINED THAT THE GAS WAS MIGRATING UNDERGROUND AND WE WERE PICKING UP READINGS BY THE PARKING LOT AND CLOSE TO THE GARAGE/WAREHOUSE BUILDING. NOTIFIED GAS CONTROL OF THE FINDINGS AND BEGAN ARRANGEMENTS TO ISOLATE THE SEGMENT OF LN 50 FROM LUTHERSBURG GATE# 107 TO BIG RUN GATE # 90. THE PRESSURE ON LN 50 WAS 890# AND WAS BLOWN TO ATMOSPHERE. AFTER EXCAVATING THE VALVE, IT WAS FOUND THAT THE LEAK WAS AT THE 6' WOL ON LN 50. LUTHERSBURG TRANSMISSION WITH THE ASSISTANCE OF LUTHERSBURG G&P EMPLOYEES REPLACED THE SECTION OF 30" PIPE. THE PIPE WAS REPLACED WITH A STRAIGHT PIECE OF PIPE AND THE 'J' VALVE WAS REMOVED. THE 6' WAS CUT & CAPPED. THE LINE WAS PUT BACK IN SERVICE AND TURNED OVER TO GAS CONTROL AT 5:09 PM, MONDAY THE 9TH.

PHMSA trend classification: significant incident, not serious.

PHMSA standardized cause: ALL OTHER CAUSES — MISCELLANEOUS.

PHMSA indexed costs: $121,301 reported total cost, $84,336.143 in 1984 dollars, $139,323.555 in current-year dollars.

PHMSA trend flags, standardized causes, and indexed costs are analytical fields added to operator-reported incident data. They do not represent final agency causal findings.